Light intensity and characteristics of photocells

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Light intensity and characteristics of photocells

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One Canada Square - Wikipedia The photometry units are designed to take this into account, and therefore are a better representation of how "bright" a light appears to be than raw intensity. They relate to raw power by a quantity called luminous efficacyand are used for purposes like determining how to best achieve sufficient illumination for various tasks in indoor and outdoor settings.
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This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. Variables The input variable which will be used in this investigation will be the light intensity this will be a Watt bulb being moved closer and further away from the plant.

The outcome variable which will change as a result of this experiment will be the amount of oxygen made in the experiment due to the amount of light intensity increases causing the plant to photosynthesise more.

Prediction I predict that as the input variable, the light intensity increases the light moved towards the plant the outcome variable, the amount of oxygen, produced from photosynthesis will be larger.

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Plants can absorb and use light energy because they have a green pigment, chlorophyll, contained in the chloroplasts in some of their cells. Chlorophyll allows the energy in sunlight to drive chemical reactions. Chloroplasts act as a energy transducers, converting light energy into chemical energy.

So as the plant has more light the chlorophyll inside the chloroplasts can react faster absorbing in more light for food and energy. The equation for photosynthesis can help to predict the outcome of the investigation.

Light intensity and characteristics of photocells

So in our case the variable light energy light intensity will be used. The equation also shows that if there is more light energy then more glucose and oxygen will be produced.

I also predict that as the light is moved closer to the plant there will be more bubbles oxygen produced due to the increase of photosynthesis speed explained above. So in conclusion I predict that the more light intensity there is on the plant the faster the rate of photosynthesis there will be.

Fair Testing The fair testing will be carefully checked so the results do not come out to be void. The light intensity will be changed for it is the only variable used in the experiment. Though the temperature, watt of the bulb, amount of water, size of the plant and position of the clamp and stand.

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The reason in which I will keep the other variables the same is because if increased they would increase the rate of photosynthesis making the experiment pointless and a waste of time.

Also if they decrease then it will be likely that the rate of photosynthesis will decrease as well. Me and my partner in this experiment decided that we will set the timer to start after sixty seconds in which the light has been turned on, we chose this because the photosynthesis rate will have been rising and be at a steady rate to take the amount of bubble recording after one minute.

We will be doing each light intensity test three times to get an average for our graphs. Apparatus The apparatus I will be using are:Electrospinning is a process by which polymer nanofibers (with diameter lower than nm and lengths up to kilometres) can be produced using an electrostatically driven .

Light intensity and characteristics of photocells

Electrons migrate through the conductor rather slowly, but the electrical energy they produce is transmitted at the speed of light about , miles per second!

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ESSAYS, term and research papers available for UNLIMITED access. A Light Sensor generates an output signal indicating the intensity of light by measuring the radiant energy that exists in a very narrow range of frequencies basically called “light”, and which ranges in frequency from “Infra-red” to “Visible” up to “Ultraviolet” light spectrum..

The light sensor is a passive devices that convert this “light energy” whether visible or . Determining Target Light Levels.

The Illuminating Engineering Society of North America has developed a procedure for determining the appropriate average light level for a particular space. On this chart, a radioactive element is called long-lived if the half-life of any of its isotopes is more than one year; otherwise it is called short-lived.

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